Note 3 - Segment Reporting Adjusted Pretax Operating Income (Loss) (Details) - USD ($)		3 Months Ended			6 Months Ended
		Jun. 30, 2020	Jun. 30, 2019		Jun. 30, 2020	Jun. 30, 2019
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Adjusted pretax operating income (loss)		$ (93,138,000)	$ 210,938,000		$ 107,662,000	$ 410,644,000
Net gains (losses) on investments and other financial instruments		47,276,000	12,540,000		25,249,000	34,453,000
Amortization and impairment of other acquired intangible assets		(979,000)	(2,139,000)		(1,958,000)	(4,326,000)
Impairment of other long-lived assets and other-non-operating items		(22,000)	103,000		(322,000)	(5,557,000)
Consolidated pretax income (loss)		(42,224,000)	209,545,000		139,069,000	425,681,000
Gain (Loss) on Extinguishment of Debt		0	(16,798,000)		0	(16,798,000)
Mortgage segment
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total Operating Expenses Allocated to Subsidiaries From Parent Company		25,191,000	24,388,000		54,265,000	50,013,000
Depreciation		3,112,000	3,849,000		6,824,000	7,711,000
Adjusted pretax operating income (loss)	[1]	(88,321,000)	214,710,000	[2]	117,346,000	418,341,000	[2]
Real Estate segment
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total Operating Expenses Allocated to Subsidiaries From Parent Company		3,339,000	2,659,000		7,175,000	5,454,000
Depreciation		776,000	615,000		1,442,000	1,208,000
Adjusted pretax operating income (loss)	[3]	(4,817,000)	(3,772,000)		(9,684,000)	(7,697,000)
All Other activities segment
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Adjusted pretax operating income (loss)		$ 4,639,000	$ 4,901,000		$ 8,438,000	$ 7,265,000

[1] Includes allocated corporate operating expenses and depreciation expense as follows: Three Months Ended
June 30,Six Months Ended
June 30,(In thousands)2020201920202019Allocated corporate operating expenses$25,191  $24,388  $54,265  $50,013  Depreciation expense3,112  3,849  6,824  7,711  

[2] Includes a cumulative adjustment to unearned premiums recorded in the second quarter of 2019, as further described below.

[3] Includes allocated corporate operating expenses and depreciation expense as follows: Three Months Ended
June 30,Six Months Ended
June 30,(In thousands)2020201920202019Allocated corporate operating expenses$3,339  $2,659  $7,175  $5,454  Depreciation expense776  615  1,442  1,208   Our results for the second quarter of 2019 include a $32.9 million increase in net premiums earned and a $0.12 increase in net income per share due to a reduction in our unearned premiums, resulting from a cumulative adjustment related to an update to the amortization rates used to recognize revenue for Single Premium Policies. See Note 2 of Notes to Consolidated Financial Statements in our 2019 Form 10-K for additional information regarding this adjustment and our accounting policies for insurance premiums revenue recognition.